/*
 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
/**
 */
package com.sun.max.memory;

import com.sun.max.unsafe.*;
import com.sun.max.vm.runtime.*;

/**
 * Immortal memory region can be used to allocate objects at runtime that are not collected by the GC.
 */
public class ImmortalMemoryRegion extends LinearAllocationMemoryRegion {

    public ImmortalMemoryRegion(String name) {
        super(name);
    }

    public void initialize(Size size) {
        Pointer region = VirtualMemory.allocate(size, VirtualMemory.Type.HEAP);
        if (region.equals(Pointer.zero())) {
            FatalError.unexpected("Initialization of immortal memory region failed");
        }
        this.size = size;
        this.start = region;
        this.mark.set(region);
    }

    public void initialize(MemoryRegion memoryRegion) {
        setStart(memoryRegion.start());
        setSize(memoryRegion.size());
        mark.set(memoryRegion.start());
    }

}
